Gearing for thread-cutting machines.



110,818,114. PATENTED APR. 17, 1906.

H. W. OSTER.

.GEARING FOB. THREAD CUTTING MACHINES.

APPLICATION FILED AUG. 14, 1906.

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No. 818,114. PATENTED APR. 17, 1906. H. w. OSTBR.

GBARING FOR THREAD CUTTING MACHINES.

APPLICATION FILBD AUG. 14, 1905.

2 SHEETS-SHEET 2.

Witnww'ed" M WW UNITED STATES PATENT OFFICE.

HERMAN \V. OS'IER, OF CLEVELAND, OHIO, ASSIGNOR TO THE OSTER MANUFACTURING COMPANY, A CORPORATION OF OHIO.

GEARING FOR THREAD-CUTTING MACHINES.

Specification of Letters Patent.

atented April 17, 1906.

Application filed August 14, 1905. Serial No. 274,073.

To all whom it may concern.-

Be it known that I, HERMAN W. OSTER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Gearing for Thread-Cutting Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The invention is an improvement on awellknown type of thread-cutting machines, the object being to provide cheap and simple means by which the speed of the cutter-head may be varied in comparison with the speed of the driving-shaft.

In the drawings, Figure 1 is a side elevation of a thread-cutting machine embodying my invention. Fig. 2 is a front elevation thereof, and Fig. 3 is a sectional view in the plane indicated by line 8 3 of Fig. 2.

The machine shown is of familiar construction in respect to everything except the mechanism by which the operating-shaft A is rotated at different speeds. The old parts are substantially like the machine disclosed in my prior patent, No. 494,412, of March 12, 1902.

The cutter-head B is mounted so as to be able to rotate, and it is rotated by means of a bevel-gear secured to shaft A, as shown in dotted lines in Fig. 2. This shaft is rotatably mounted in a suitable part of the frame C of the machine. A large gear D is fixed to that shaft, and a smaller gear E is rotatably mounted thereon, and an operating-handle F is secured to the hub e of said gear E. A springpin G is carried by the hub e of said gear, extending through the same from end to end, and its projecting inner end is adapted to enter any one of several recesses d in the face of the gear D. In the end of the hub e is a slot 6, crossing the hole through which the pin G passes, and on the pin G are laterally-project ing fingers g, adapted when said pin is turned to engage with the end of said hub, and thereby to prevent the spring 9 from forcing the pin into position to engage with one of the re cesses (Z. When the pin G is turned to the proper position, said fingers g will enter this slot 6, which permits the pin G to engage in one of said recesses d. When it is so engaging, the gear E and the operating-handle which it carries are thereby fixed to shaft A and cannot rotate independently thereof.

A sliding shaft H is mounted in the frame C, and to its outer end are secured two gears J and K, adapted to mesh, respectively, with the gears D and E. When the parts are in position shown in Fig. 2, the rotation of gear E is transmitted to shaft Athrough gears K, J, and D, and the shaft H is held in the position to maintain the gears in mesh, as shown by means of a spring pin M, mounted in the frame C and projecting into an annular groove h in the shaft H. When it is desired to turn the shaft A in unison with gear E, the pin M is pulled outward, so as to free its inner end from the groove h. On the outwardlyprojecting part of this pin is a laterally-projecting finger m, which when the parts are in position shown in Figs. 2 and 3 enters a slot 0 in the framework. When the pin M has been pulled out and turned, however, this finger m engages with the framework and holds the pin out of engagement with the shaft H. Said shaft may now be moved endwise outwardly until gears J and K are freed from their meshing engagement with gears D and .E, and by manipulating the pin G gears D and E are connected together, as before explained.

Having thus described my invention, I claim- 1. In a thread-cutter, in combination with the driving-shaft thereof, a gear D secured to said shaft, a gear E rotatably mounted thereon, a pin-clutch for connecting and disconnecting said gears, and an operating-handle secured to the pin, with a sliding shaft H two gears J and K secured thereto for engagement with the gears D and E, and means preventing the endwise movement of shaft H in the direction to cause a disengagement of said gears.

2. In a thread-cutter, in combination with the driving-shaft, a gear D secured thereto having in its face a plurality of recesses A, a gear E loosely mounted upon said shaft and having a slot 6 in its hub, a spring-pin extending through the hub of said gear and having on its outer end a small cross-bar g, a sliding shaft H rotatably mounted in the frame of the machine, and two gears J and K secured thereto, said shaft having an annular groove 7L, a spring pin mounted in the frame In testimony whereof I hereunto afliX my of the machine and adapted to engage in said signature in the presence of two WIltIlGSSES.

annular groove and having a small cross-- arm m on its oiitwardlyextended end, there HERMAN OSTER' being a slot in the frame of the machine cross- Witnesses:

ing the hole through which said pin passes, E. B. GILoHRIsT,

substantially as described and specified. J. M. WOODWARD. 

